diff options
Diffstat (limited to 'shell/ev-page-view.c')
| -rw-r--r-- | shell/ev-page-view.c | 678 |
1 files changed, 678 insertions, 0 deletions
diff --git a/shell/ev-page-view.c b/shell/ev-page-view.c new file mode 100644 index 0000000..050e3cc --- /dev/null +++ b/shell/ev-page-view.c @@ -0,0 +1,678 @@ +/* + * Copyright (C) 2005 Jonathan Blandford + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2, or (at your option) + * any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + */ + +#include "config.h" + +#include "ev-page-view.h" +#include "ev-marshal.h" +#include "ev-document-misc.h" +#include <gtk/gtk.h> + +/* We keep a cached array of all the page sizes. The info is accessed via + * page_sizes [page - 1], as pages start at 1 */ +typedef struct _EvPageViewInfo +{ + gint width; + gint height; +} EvPageViewInfo; + +struct _EvPageViewPrivate +{ + gint width, height; + gint page_spacing; + + GdkWindow *bin_window; + EvDocument *document; + EvPageViewInfo *page_sizes; + + GtkAdjustment *hadjustment; + GtkAdjustment *vadjustment; + + gdouble scale; + + /* Page information*/ + gint n_pages; + gint max_page_width; + + /* these two are only set if uniform_page_size is set */ + gint uniform_page_width; + gint uniform_page_height; + guint uniform_page_size : 1; +}; + + +static void ev_page_view_init (EvPageView *page_view); +static void ev_page_view_class_init (EvPageViewClass *klass); +static void ev_page_view_set_scroll_adjustments (EvPageView *page_view, + GtkAdjustment *hadjustment, + GtkAdjustment *vadjustment); +static void ev_page_view_size_request (GtkWidget *widget, + GtkRequisition *requisition); +static void ev_page_view_size_allocate (GtkWidget *widget, + GtkAllocation *allocation); +static gboolean ev_page_view_expose (GtkWidget *widget, + GdkEventExpose *expose); +static void ev_page_view_realize (GtkWidget *widget); +static void ev_page_view_unrealize (GtkWidget *widget); +static void ev_page_view_map (GtkWidget *widget); +static void ev_page_view_load (EvPageView *page_view); +static void ev_page_view_adjustment_changed (GtkAdjustment *adjustment, + EvPageView *page_view); +static void ev_page_view_update_size (EvPageView *page_view); + + +G_DEFINE_TYPE (EvPageView, ev_page_view, GTK_TYPE_WIDGET) + +#define EV_PAGE_VIEW_GET_PRIVATE(object)(G_TYPE_INSTANCE_GET_PRIVATE ((object), EV_TYPE_PAGE_VIEW, EvPageViewPrivate)) + +static void +ev_page_view_init (EvPageView *page_view) +{ + page_view->priv = EV_PAGE_VIEW_GET_PRIVATE (page_view); + + page_view->priv->width = 1; + page_view->priv->height = 1; + page_view->priv->page_spacing = 10; + page_view->priv->scale = 1.0; + + /* Make some stuff up */ + page_view->priv->n_pages = 0; + page_view->priv->uniform_page_width = -1; + page_view->priv->uniform_page_height = -1; + page_view->priv->uniform_page_size = FALSE; +} + +static void +ev_page_view_class_init (EvPageViewClass *klass) +{ + GObjectClass *o_class; + GtkWidgetClass *widget_class; + + o_class = (GObjectClass *) klass; + widget_class = (GtkWidgetClass *) klass; + klass->set_scroll_adjustments = ev_page_view_set_scroll_adjustments; + + g_type_class_add_private (klass, sizeof (EvPageViewPrivate)); + widget_class->size_request = ev_page_view_size_request; + widget_class->size_allocate = ev_page_view_size_allocate; + widget_class->expose_event = ev_page_view_expose; + widget_class->realize = ev_page_view_realize; + widget_class->unrealize = ev_page_view_unrealize; + widget_class->map = ev_page_view_map; + + widget_class->set_scroll_adjustments_signal = + g_signal_new ("set_scroll_adjustments", + G_TYPE_FROM_CLASS (o_class), + G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION, + G_STRUCT_OFFSET (EvPageViewClass, set_scroll_adjustments), + NULL, NULL, + ev_marshal_VOID__OBJECT_OBJECT, + G_TYPE_NONE, 2, + GTK_TYPE_ADJUSTMENT, + GTK_TYPE_ADJUSTMENT); + + +} + + +static void +ev_page_view_set_scroll_adjustments (EvPageView *page_view, + GtkAdjustment *hadjustment, + GtkAdjustment *vadjustment) +{ + gboolean need_adjust = FALSE; + + if (hadjustment) + g_return_if_fail (GTK_IS_ADJUSTMENT (hadjustment)); + else + hadjustment = GTK_ADJUSTMENT (gtk_adjustment_new (0.0, 0.0, 0.0, 0.0, 0.0, 0.0)); + if (vadjustment) + g_return_if_fail (GTK_IS_ADJUSTMENT (vadjustment)); + else + vadjustment = GTK_ADJUSTMENT (gtk_adjustment_new (0.0, 0.0, 0.0, 0.0, 0.0, 0.0)); + + if (page_view->priv->hadjustment && (page_view->priv->hadjustment != hadjustment)) + { + g_signal_handlers_disconnect_matched (page_view->priv->hadjustment, G_SIGNAL_MATCH_DATA, + 0, 0, NULL, NULL, page_view); + g_object_unref (page_view->priv->hadjustment); + } + + if (page_view->priv->vadjustment && (page_view->priv->vadjustment != vadjustment)) + { + g_signal_handlers_disconnect_matched (page_view->priv->vadjustment, G_SIGNAL_MATCH_DATA, + 0, 0, NULL, NULL, page_view); + g_object_unref (page_view->priv->vadjustment); + } + + if (page_view->priv->hadjustment != hadjustment) + { + page_view->priv->hadjustment = hadjustment; + g_object_ref (page_view->priv->hadjustment); + gtk_object_sink (GTK_OBJECT (page_view->priv->hadjustment)); + + g_signal_connect (page_view->priv->hadjustment, "value_changed", + G_CALLBACK (ev_page_view_adjustment_changed), + page_view); + need_adjust = TRUE; + } + + if (page_view->priv->vadjustment != vadjustment) + { + page_view->priv->vadjustment = vadjustment; + g_object_ref (page_view->priv->vadjustment); + gtk_object_sink (GTK_OBJECT (page_view->priv->vadjustment)); + + g_signal_connect (page_view->priv->vadjustment, "value_changed", + G_CALLBACK (ev_page_view_adjustment_changed), + page_view); + need_adjust = TRUE; + } + + if (need_adjust) + ev_page_view_adjustment_changed (NULL, page_view); +} + +static void +ev_page_view_update_size (EvPageView *page_view) +{ + gint left_border; + gint right_border; + gint top_border; + gint bottom_border; + gint width, height; + + g_assert (page_view->priv->scale > 0.0); + + if (page_view->priv->uniform_page_size) { + width = (int) (page_view->priv->uniform_page_width * + page_view->priv->scale); + height = (int) (page_view->priv->uniform_page_height * + page_view->priv->scale); + + ev_document_misc_get_page_border_size (width, height, + & left_border, & right_border, + & top_border, & bottom_border); + + page_view->priv->width = width + + page_view->priv->page_spacing * 2 + + left_border + + right_border; + page_view->priv->height = + ((height + + page_view->priv->page_spacing + + top_border + + bottom_border) + * page_view->priv->n_pages) + + page_view->priv->page_spacing; + } else { + int i; + + page_view->priv->width = 0; + page_view->priv->height = page_view->priv->page_spacing; + + for (i = 0; i < page_view->priv->n_pages; i++) { + width = page_view->priv->page_sizes[i].width * + page_view->priv->scale; + height = page_view->priv->page_sizes[i].height * + page_view->priv->scale; + + ev_document_misc_get_page_border_size (width, height, + & left_border, & right_border, + & top_border, & bottom_border); + + width = width + + page_view->priv->page_spacing * 2 + + left_border + + right_border; + height = height + + page_view->priv->page_spacing + + top_border + + bottom_border; + + page_view->priv->width = MAX (width, page_view->priv->width); + page_view->priv->height += height; + } + } + +} + +static void +ev_page_view_size_request (GtkWidget *widget, + GtkRequisition *requisition) +{ + EvPageView *page_view; + + page_view = EV_PAGE_VIEW (widget); + + ev_page_view_update_size (page_view); + + requisition->width = page_view->priv->width; + requisition->height = page_view->priv->height; +} + +static void +ev_page_view_paint_one_page (EvPageView *page_view, + GdkRectangle *area, + gint left_border, + gint right_border, + gint top_border, + gint bottom_border) +{ + GtkWidget *widget; + + widget = GTK_WIDGET (page_view); + + g_print ("paint one page (%d,%d) %dx%d\n", + area->x, area->y, + area->width, + area->height); + gdk_draw_rectangle (page_view->priv->bin_window, + widget->style->black_gc, + TRUE, + area->x, + area->y, + area->width, + area->height); + gdk_draw_rectangle (page_view->priv->bin_window, + widget->style->white_gc, + TRUE, + area->x + left_border, + area->y + top_border, + area->width - (left_border + right_border), + area->height - (top_border + bottom_border)); + gdk_draw_rectangle (page_view->priv->bin_window, + widget->style->mid_gc[widget->state], + TRUE, + area->x, + area->y + area->height - (bottom_border - top_border), + bottom_border - top_border, + bottom_border - top_border); + gdk_draw_rectangle (page_view->priv->bin_window, + widget->style->mid_gc[widget->state], + TRUE, + area->x + area->width - (right_border - left_border), + area->y, + right_border - left_border, + right_border - left_border); +} + +static void +ev_page_view_expose_uniform (GtkWidget *widget, + GdkEventExpose *expose) +{ + EvPageView *page_view; + gint left_border; + gint right_border; + gint top_border; + gint bottom_border; + int x_offset = 0; + GdkRectangle rectangle; + gint width, height; + int i; + + page_view = EV_PAGE_VIEW (widget); + + width = (int) (page_view->priv->uniform_page_width * + page_view->priv->scale); + height = (int) (page_view->priv->uniform_page_height * + page_view->priv->scale); + + if (widget->allocation.width > page_view->priv->width) + x_offset = (widget->allocation.width - page_view->priv->width)/2; + + ev_document_misc_get_page_border_size (width, height, + & left_border, + & right_border, + & top_border, + & bottom_border); + + rectangle.x = page_view->priv->page_spacing + x_offset; + rectangle.y = page_view->priv->page_spacing; + rectangle.width = width + + left_border + + right_border; + rectangle.height = height + + top_border + + bottom_border; + for (i = 0; i < page_view->priv->n_pages; i++) { + GdkRectangle unused; + + if (gdk_rectangle_intersect (&rectangle, + &expose->area, + &unused)) + ev_page_view_paint_one_page (page_view, + & rectangle, + left_border, right_border, + top_border, bottom_border); + rectangle.y += rectangle.height + + page_view->priv->page_spacing; + + } +} + +static void +ev_page_view_expose_pages (GtkWidget *widget, + GdkEventExpose *expose) +{ + EvPageView *page_view; + gint left_border; + gint right_border; + gint top_border; + gint bottom_border; + int x_offset = 0; + GdkRectangle rectangle; + gint width, height; + int i; + + page_view = EV_PAGE_VIEW (widget); + + width = (int) (page_view->priv->uniform_page_width * + page_view->priv->scale); + height = (int) (page_view->priv->uniform_page_height * + page_view->priv->scale); + + if (widget->allocation.width > page_view->priv->width) + x_offset = (widget->allocation.width - page_view->priv->width)/2; + + ev_document_misc_get_page_border_size (width, height, + & left_border, + & right_border, + & top_border, + & bottom_border); + + rectangle.x = page_view->priv->page_spacing + x_offset; + rectangle.y = page_view->priv->page_spacing; + rectangle.width = width + + left_border + + right_border; + rectangle.height = height + + top_border + + bottom_border; + for (i = 0; i < page_view->priv->n_pages; i++) { + GdkRectangle unused; + + if (gdk_rectangle_intersect (&rectangle, + &expose->area, + &unused)) + ev_page_view_paint_one_page (page_view, + & rectangle, + left_border, right_border, + top_border, bottom_border); + rectangle.y += rectangle.height + + page_view->priv->page_spacing; + + } +} + +static gboolean +ev_page_view_expose (GtkWidget *widget, + GdkEventExpose *expose) +{ + EvPageView *page_view; + + page_view = EV_PAGE_VIEW (widget); + + if (expose->window != page_view->priv->bin_window) + return FALSE; + + if (page_view->priv->uniform_page_size) { + ev_page_view_expose_uniform (widget, expose); + } else { + ev_page_view_expose_pages (widget, expose); + } + + return TRUE; +} + +static void +ev_page_view_size_allocate (GtkWidget *widget, + GtkAllocation *allocation) +{ + EvPageView *page_view; + + widget->allocation = *allocation; + + page_view = EV_PAGE_VIEW (widget); + + if (GTK_WIDGET_REALIZED (widget)) + { + gdk_window_move_resize (widget->window, + allocation->x, allocation->y, + allocation->width, allocation->height); + gdk_window_resize (page_view->priv->bin_window, + MAX (page_view->priv->width, allocation->width), + MAX (page_view->priv->height, allocation->height)); + } + + page_view->priv->hadjustment->page_size = allocation->width; + page_view->priv->hadjustment->page_increment = allocation->width * 0.9; + page_view->priv->hadjustment->step_increment = allocation->width * 0.1; + page_view->priv->hadjustment->lower = 0; + page_view->priv->hadjustment->upper = MAX (allocation->width, page_view->priv->width); + gtk_adjustment_changed (page_view->priv->hadjustment); + + page_view->priv->vadjustment->page_size = allocation->height; + page_view->priv->vadjustment->page_increment = allocation->height * 0.9; + page_view->priv->vadjustment->step_increment = allocation->width * 0.1; + page_view->priv->vadjustment->lower = 0; + page_view->priv->vadjustment->upper = MAX (allocation->height, page_view->priv->height); + gtk_adjustment_changed (page_view->priv->vadjustment); +} + +static void +ev_page_view_adjustment_changed (GtkAdjustment *adjustment, + EvPageView *page_view) +{ + if (GTK_WIDGET_REALIZED (page_view)) { + gdk_window_move (page_view->priv->bin_window, + - page_view->priv->hadjustment->value, + - page_view->priv->vadjustment->value); + + gdk_window_process_updates (page_view->priv->bin_window, TRUE); + } +} + +static void +ev_page_view_realize_document (EvPageView *page_view) +{ + if (page_view->priv->document == NULL) + return; + + ev_document_set_target (page_view->priv->document, + page_view->priv->bin_window); + ev_page_view_load (page_view); + gtk_widget_queue_resize (GTK_WIDGET (page_view)); +} + + +static void +ev_page_view_realize (GtkWidget *widget) +{ + EvPageView *page_view; + GdkWindowAttr attributes; + gint attributes_mask; + + g_return_if_fail (EV_IS_PAGE_VIEW (widget)); + + page_view = EV_PAGE_VIEW (widget); + GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED); + + /* Make the main, clipping window */ + attributes.window_type = GDK_WINDOW_CHILD; + attributes.x = widget->allocation.x; + attributes.y = widget->allocation.y; + attributes.width = widget->allocation.width; + attributes.height = widget->allocation.height; + attributes.wclass = GDK_INPUT_OUTPUT; + attributes.visual = gtk_widget_get_visual (widget); + attributes.colormap = gtk_widget_get_colormap (widget); + attributes.event_mask = GDK_VISIBILITY_NOTIFY_MASK; + + attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP; + + widget->window = gdk_window_new (gtk_widget_get_parent_window (widget), + &attributes, attributes_mask); + gdk_window_set_user_data (widget->window, widget); + + /* Make the window for the page view */ + attributes.x = 0; + attributes.y = 0; + attributes.width = MAX (page_view->priv->width, widget->allocation.width); + attributes.height = MAX (page_view->priv->height, widget->allocation.height); + attributes.event_mask = (GDK_EXPOSURE_MASK | + GDK_SCROLL_MASK | + GDK_POINTER_MOTION_MASK | + GDK_BUTTON_PRESS_MASK | + GDK_BUTTON_RELEASE_MASK | + GDK_KEY_PRESS_MASK | + GDK_KEY_RELEASE_MASK) | + gtk_widget_get_events (widget); + + page_view->priv->bin_window = gdk_window_new (widget->window, + &attributes, attributes_mask); + gdk_window_set_user_data (page_view->priv->bin_window, widget); + + widget->style = gtk_style_attach (widget->style, widget->window); + gdk_window_set_background (page_view->priv->bin_window, &widget->style->mid[widget->state]); + gdk_window_set_background (widget->window, &widget->style->mid[widget->state]); + + ev_page_view_realize_document (page_view); +} + + +static void +ev_page_view_unrealize (GtkWidget *widget) +{ + EvPageView *page_view; + + page_view = EV_PAGE_VIEW (widget); + + gdk_window_set_user_data (page_view->priv->bin_window, NULL); + gdk_window_destroy (page_view->priv->bin_window); + page_view->priv->bin_window = NULL; + + /* GtkWidget::unrealize destroys children and widget->window */ + if (GTK_WIDGET_CLASS (ev_page_view_parent_class)->unrealize) + (* GTK_WIDGET_CLASS (ev_page_view_parent_class)->unrealize) (widget); +} + +static void +ev_page_view_map (GtkWidget *widget) +{ + EvPageView *page_view; + + page_view = EV_PAGE_VIEW (widget); + + GTK_WIDGET_SET_FLAGS (widget, GTK_MAPPED); + + gdk_window_show (page_view->priv->bin_window); + gdk_window_show (widget->window); +} + +static void +ev_page_view_load (EvPageView *page_view) +{ + int i; + gboolean uniform_page_size = TRUE; + int width = 0, height = 0; + + page_view->priv->n_pages = + ev_document_get_n_pages (page_view->priv->document); + + for (i = 1; i <= page_view->priv->n_pages; i++) { + EvPageViewInfo *info; + gint page_width = 0; + gint page_height = 0; + + ev_document_set_scale (page_view->priv->document, page_view->priv->scale); + ev_document_get_page_size (page_view->priv->document, + i, + &page_width, &page_height); + + if (i == 1) { + width = page_width; + height = page_height; + } else if (width != page_width || height != page_height) { + /* It's a different page size. Backfill the array. */ + int j; + + uniform_page_size = FALSE; + + page_view->priv->page_sizes = + g_new0 (EvPageViewInfo, page_view->priv->n_pages); + + for (j = 1; j < i; j++) { + + info = &(page_view->priv->page_sizes[j - 1]); + info->width = width; + info->height = height; + } + } + + if (! uniform_page_size) { + info = &(page_view->priv->page_sizes[i - 1]); + + info->width = page_width; + info->height = page_height; + } + } + + page_view->priv->uniform_page_size = uniform_page_size; + + if (uniform_page_size) { + page_view->priv->uniform_page_width = width; + page_view->priv->uniform_page_height = height; + } + + ev_page_view_update_size (page_view); + + gtk_widget_queue_resize (GTK_WIDGET (page_view)); +} + +/* Public functions */ +GtkWidget * +ev_page_view_new (void) +{ + return g_object_new (EV_TYPE_PAGE_VIEW, NULL); +} + +void +ev_page_view_set_document (EvPageView *page_view, + EvDocument *document) +{ + g_return_if_fail (EV_IS_PAGE_VIEW (page_view)); + + if (document != page_view->priv->document) { + if (page_view->priv->document) { + g_object_unref (page_view->priv->document); + } + + page_view->priv->document = document; + + if (page_view->priv->document) { + g_object_ref (page_view->priv->document); + } + + if (GTK_WIDGET_REALIZED (page_view)) { + ev_page_view_realize_document (page_view); + } + } + +} + |